That established trio of leaders had better make space for another big dog. Oracle (NAS: ORCL) just announced a pair of cloud-computing services that will compete head-to-head with Amazon's AWS, Microsoft Azure, and Rackspace Cloud Hosting.

An AWS-like hosted solution will join a private cloud platform where the hardware is installed in the customer's data centers. Either way, Oracle is responsible for managing and operating the hardware while customers simply treat the platform as a blob of additional computing resources. This is in every way similar to what the current incumbents offer, except Oracle will prefer its own Sun Solaris-based equipment over the Linux and Windows solutions popular elsewhere.

If Oracle wants to copy somebody else's business model, the database expert could certainly pick far worse role models than Amazon. To help you understand why the leading e-tailer and budding IT giant garners recommendations from four separate Fool services, we've compiled a premium report on Amazon. In it, you'll see every rocket booster at Amazon's tail and every potential road block that lies ahead. Click here to get started.